Video: Scott Walker drops out of GOP presidential race

Wisconsin governor Scott Walker has dropped out of the Republican race for president. One of the last Republicans to enter the race, Walker joins former Texas Governor Rick Perry as one of the first to leave it. (Sept. 21, AP)

Wisconsin governor Scott Walker has dropped out of the Republican race for president. One of the last Republicans to enter the race, Walker joins former Texas Governor Rick Perry as one of the first to leave it. (Sept. 21, AP)

Wisconsin governor Scott Walker has dropped out of the Republican race for president. One of the last Republicans to enter the race, Walker joins former Texas Governor Rick Perry as one of the first to leave it. (Sept. 21, AP)